CN102554405B - Device and method for eliminating argon-arc welding contact arc striking adhesion - Google Patents
Device and method for eliminating argon-arc welding contact arc striking adhesion Download PDFInfo
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- CN102554405B CN102554405B CN201210030857.9A CN201210030857A CN102554405B CN 102554405 B CN102554405 B CN 102554405B CN 201210030857 A CN201210030857 A CN 201210030857A CN 102554405 B CN102554405 B CN 102554405B
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Abstract
The invention discloses a device for eliminating argon-arc welding contact arc striking adhesion, which is characterized by comprising a main circuit, an auxiliary voltage circuit and a no-load voltage detecting circuit. The auxiliary voltage circuit is used for supplying auxiliary voltage, no-load voltage is equal to the auxiliary voltage as the voltage of the main circuit cannot be outputted when the device is no-load, and the device is short-circuited according to no-load voltage value when the no-load voltage detecting circuit detects the no-load voltage. The invention further discloses a method for eliminating argon-arc welding contact arc striking adhesion.
Description
Technical field
The present invention relates to a kind of Electric arc welding technology, particularly relate to a kind of Apparatus and method for eliminating argon arc welding contacting ignition arc haftplatte.
Background technology
SMAW is most widely used welding method in industrial production, its principle is that welding rod and workpiece melt mutually and form weld seam after condensation by the heat utilizing arc discharge (being commonly called as arc burning) to produce, thus obtains the welding process of firm joint.Wherein, supplied by the source of welding current, produce strong and lasting gas discharge phenomenon-be electric arc at workpiece and welding rod two interpolar.
Argon arc welding technology is on the basis of the principle of conventional arc weldering; utilize argon gas to the protection of metal wlding; logical excessive current makes wlding on welded base material, be melted into liquid formation bath; welded metal and wlding is made to reach a kind of solder technology of metallurgical binding; owing to constantly serving argon gas in high-temperature fusion welding; wlding can not be contacted with the oxygen in air, thus prevent the oxidation of wlding, therefore can the non-ferrous metal such as soldering copper, aluminium, steel alloy.
In argon arc welding welding process, striking has three kinds of modes, and contact arc, high-voltage arc strike, high-frequency arc strike, wherein contacting ignition arc is the simplest and easy also the most frequently used.But in contacting ignition arc process, when welding thin plate, often there will be tungsten electrode and absorption surface and producing a lot of energy instantaneously and make on the sticky and workpiece of tungsten electrode, thus affecting welding quality defective work piece.
Therefore, be badly in need of in prior art wanting a kind of new technical scheme can eliminate the phenomenon of contact arc haftplatte in argon arc welding process.
Summary of the invention
In order to overcome the defect existed in prior art, the object of the invention is to openly a kind of Apparatus and method for eliminating argon arc welding contacting ignition arc haftplatte.
In order to realize foregoing invention object, the present invention discloses a kind of equipment eliminating argon arc welding contacting ignition arc haftplatte, it is characterized in that, comprising: main circuit, boost voltage circuit and no-load voltage detection circuit; This boost voltage circuit is in order to provide a boost voltage, and when this equipment is unloaded, this main circuit voltage cannot be exported, floating voltage equals boost voltage; This no-load voltage detection circuit detects this floating voltage, makes this equipment short circuit according to this floating voltage value.
Further, this boost voltage circuit comprises an insulating power supply, and the two ends positive pole of this insulating power supply connects 15V voltage respectively, the two ends negative pole ground connection respectively of this isolation voltage.The both positive and negative polarity of one end of this boost voltage circuit is connected with the first decoupling capacitor, the first filter capacitor, a diode, the first resistance, the second resistance.The both positive and negative polarity of one end of this boost voltage circuit is connected with the second decoupling capacitor second filter capacitor.
Further, this no-load voltage detection circuit comprises a linear optical coupling, for exporting and controlling electrical isolation and this floating voltage is converted to level signal.This no-load voltage detection circuit also comprises resistance R300 to R306, electric capacity C300, C301, C404 and variable resistor, one end of this resistance 300 is connected with this main circuit voltage, the other end is connected with this electric capacity C300, this resistance R301 one end is connected with this electric capacity C300, the other end is connected with the diode of this linear optical coupling, this resistance R302 one end is connected with this electric capacity C300, the other end is connected with the diode of this linear optical coupling, this resistance R303 one end is connected other end ground connection with this linear optical coupling, one end, this resistance R304 one end is connected the other end and is connected with this electric capacity C301 with this linear optical coupling, this variable resistor one end is connected with this electric capacity C301, the other end is connected with this resistance R305, convertible tip is connected with this resistance R306, this electric capacity one end is connected with this resistance R306, other end ground connection.
The present invention provides a kind of method eliminating argon arc welding contacting ignition arc haftplatte simultaneously, it is characterized in that, the main circuit being included in an argon arc welding equipment increases by an accessory power supply, and when this equipment is unloaded, this main circuit voltage cannot be exported, floating voltage equals boost voltage; Detect this floating voltage, make this equipment short circuit according to this floating voltage value.
Compared with prior art, argon arc welding equipment disclosed in this invention and method can effectively eliminate contact arc in welding process due to tungsten electrode and absorption surface produce instantaneously a lot of energy make tungsten electrode glue with workpiece on phenomenon, and then improve welding quality.
Accompanying drawing explanation
Can be further understood by following detailed Description Of The Invention and institute's accompanying drawings about the advantages and spirit of the present invention.
Fig. 1 is the electrical block diagram of argon arc welding equipment involved in the present invention;
Fig. 2 be argon arc welding equipment involved in the present invention in running order time striking current curve diagram;
Fig. 3 is the workflow diagram of argon arc welding equipment involved in the present invention.
Detailed description of the invention
Specific embodiments of the invention are described in detail below in conjunction with accompanying drawing.
When the striking that the argon arc welding of prior art uses is for removing arc, often there will be tungsten electrode and absorption surface and producing a lot of energy instantaneously and make on the sticky and workpiece of tungsten electrode, thus affecting welding quality defective work piece.
In order to eliminate the phenomenon of contact arc haftplatte in argon arc welding process, the invention provides an argon arc welding equipment.This argon arc welding equipment comprises boost voltage circuit and no-load voltage detection circuit.This boost voltage circuit provides a boost voltage, and block main circuit voltage when this welding equipment zero load and export, floating voltage is now accessory power supply voltage.Utilize this no-load voltage detection circuit to detect floating voltage, when floating voltage being detected, make this welding equipment automatic short-circuit, to prevent the generation removing arc haftplatte phenomenon in welding process.
As shown in fig. 1, Fig. 1 is the electrical block diagram of argon arc welding equipment involved in the present invention.This argon arc welding equipment is by boost voltage circuit 101, no-load voltage detection circuit 102 and main circuit (not shown).Main circuit is consistent with the main circuit of argon arc welding equipment common in prior art, comprises the compositions such as step-up transformer, rectification circuit, high frequency oscillation generator.
As shown in fig. 1, the WV in Fig. 1 is the unloaded sampled voltage of machine, and VSS is the ground of unloaded boost voltage, and 101 is boost voltage circuit, and 102 is no-load voltage detection circuit.VCC is the electric power network of voltage detecting circuit, and this boost voltage circuit 101 comprises an insulating power supply DC-DC1.One of them positive terminal of this insulating power supply DC-DC1 is connected with 15V voltage, and the negative pole end that this positive terminal is corresponding is connected with VSS.What be connected with this positive terminal, negative pole end also has electric capacity C305, decoupling capacitor C306, resistance R7 and resistance R6.Wherein the positive pole of electric capacity C305 is connected with diode D5.The effect of diode D5 prevents from main circuit from exporting WV both positive and negative polarity to connect inverse time damage insulating power supply.
Another positive terminal of this insulating power supply DC-DC1 is connected with 15V voltage, the negative pole end ground connection that this positive terminal is corresponding, and what this positive terminal, negative pole end connected also has electric capacity C307, decoupling capacitor C308.
No-load voltage detection circuit 200 also comprises resistance R300 to R306, electric capacity C300, C301, C404 and variable resistor, one end of resistance 300 is connected with main circuit voltage, the other end is connected with electric capacity C300, resistance R301 one end is connected with electric capacity C300, the other end is connected with the diode of linear optical coupling, resistance R302 one end is connected with electric capacity C300, the other end is connected with the diode of linear optical coupling, resistance R303 one end is connected other end ground connection with linear optical coupling, one end, resistance R304 one end is connected the other end and is connected with electric capacity C301 with linear optical coupling, variable resistor one end is connected with electric capacity C301, the other end is connected with resistance R305, convertible tip is connected with resistance R306, electric capacity one end is connected with resistance R306, other end ground connection.
Wherein optocoupler U300 plays output and controls electrical isolation effect and floating voltage is converted to level signal, and Vdtage_RT is the mean value of the instantaneous value of output voltage, Vdtage_FT output voltage.
In the unloaded state, because this argon arc welding equipment is in floating voltage guard mode always, pulsewidth is in blocked styate always, and according to boost voltage circuit 101, now unloaded corresponding WV voltage is 15V, facilitates judgement and the control of program.
Fig. 2 be argon arc welding equipment involved in the present invention in running order time striking current curve diagram.As shown in Figure 2, A condition represents the striking electric current before argon arc welding equipment short circuit.The short dot of B state representation argon arc welding equipment.After the short circuit of C state representation argon arc welding equipment, striking electric current slowly rises.After the short circuit of D state representation argon arc welding equipment, electric current maintains a plateau.The short circuit of E state representation argon arc welding equipment is pulled open.F state representation argon arc welding equipment pulls open after-current and slowly rises or slowly decline.
To illustrate how this argon arc welding equipment eliminates the phenomenon of contact arc haftplatte in argon arc welding process below.
Step1: determine whether argon arc welding state, the switching levels voltage VOLTAGE_FT that the WV that if so, samples is corresponding,
Step2: judge welding gun whether first time short circuit, when VOLTAGE_FT< short-circuit voltage, welding gun short circuit, now judges short circuit number of times, otherwise, then continue wait.
Step3: short circuit number of times judges to terminate, and by short circuit mark position 1, now, in quick-speed interruption, the slow welding current that rises linearly is increased to striking electric current from zero
Step4: the slow mouth of sample rate current, if CURRENT_FT sampled value is greater than certain value, then judges there is electric current, diverted current display subroutine, otherwise, display preset current.
Step5: judge whether that welding gun pulls open and be in Light Condition, if, turn step2, otherwise welding gun pulls open non-current interruption, judge that welding current is given to compare with 40A, if be greater than 40A, then call and slow rises subprogram, otherwise call to delay and fall subprogram, delay and rise electric current linearly slow liter (delay and fall) in (delay and fall) subprogram, finally reach given welding current.
Step6: run into short circuit during welding, if first time short circuit turns step2, if the time is greater than 2 minutes, turns short-circuit protection subprogram, otherwise, continue normal current given.
Step7: if detect OT_VOLTAGE> alarm voltage, be then superheat state, pulsewidth is blocked, display ER2, once detect OT_VOLTAGE<2.5V to turn step1, if overcurrent preferentially shows ER1, pulsewidth is blocked, and no longer recovers.
The implementation process of the method is described in detail below with reference to Fig. 3.Fig. 3 is the workflow diagram of argon arc welding equipment involved in the present invention.
As shown in Figure 3, first 301 enter argon arc welding, then 302 judge welding rifle (argon arc welding equipment) whether short circuit.If the judged result of 302 is "Yes", enters 303 and determine whether first time short circuit; If the judged result of 302 is "No", enter 303, now electric current is as shown in the A condition in Fig. 2.303 determine whether first time short circuit judged result be "Yes", enter 304 and judge whether the number of times of short circuit is greater than 15 times.If the judged result of 303 is "No", enter 309 judgement short circuit durations.
309 judge whether short circuit duration is greater than 1.7 minutes, if the judged result of 309 is "Yes", enter 310 short-circuit protection process.After entering 310 short-circuit protection process, judge whether welding gun opens a way 311 further.If the judged result of 311 is "Yes", enter 312, if the judged result of 311 is "No" again enter 311.
312 judge whether time delay 170ms, if the judged result of 312 is "Yes", now electric current is as shown in the A condition in Fig. 2, if the judged result of 312 is "No", then again enters 312.If the judged result of 309 is "No", enter 313 given value of currents constant.
304 judge whether the number of times of short circuit is greater than 15 times, if the judged result of 304 is "Yes", enter 305, if the judged result of 304 is "No", enter 314 and judge whether welding gun opens a way, if the judged result of 314 is "Yes", enter 302, if the judged result of 314 is "No", enter 304.
305 judge linear slow rise electric current and whether rise to 40A, if the judged result of 305 is "Yes", enter 306, if the judged result of 305 is "No", enters 315 and determine whether zero load.If the judged result of 315 is "Yes", enter 302; If the judged result of 315 is "No", enter 305.
306 judge it is whether unloaded that welding gun pulls open, if the judged result of 306 is "Yes", enter 307, now electric current is as shown in the G state in Fig. 2; If the judged result of 306 is "No", enter 301.
307 judge slow to rise slow falling whether to given electric current, if the judged result of 307 is "Yes", enter 308; If the judged result of 307 is "No", enter 316.316 judge whether welding gun opens a way, if the judged result of 316 is "Yes", now electric current is as shown in the A condition in Fig. 2; If the judged result of 316 is "No", enter 307.
308 judge whether short circuit, if the judged result of 308 is "Yes", enter 303; If the judged result of 308 is "No", enter 317.
317 determine whether zero load, if the judged result of 317 is "Yes", now electric current is as shown in the A condition in Fig. 2; If the judged result of 317 is "No", enter 318.
318 judge whether temperature alarm, if the judged result of 318 is "Yes", enter 319; If the judged result of 318 is "No", enter 313.
319 given value of currents are enter 320 after zero.
320 judge whether that cooling recovers, if the judged result of 320 is "Yes", enter 313; If the judged result of 320 is "No", enter 319.
Just preferred embodiment of the present invention described in this description, above embodiment is only in order to illustrate technical scheme of the present invention but not limitation of the present invention.All those skilled in the art, all should be within the scope of the present invention under this invention's idea by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (4)
1. eliminate an equipment for argon arc welding contacting ignition arc haftplatte, it is characterized in that, comprising: main circuit, boost voltage circuit and no-load voltage detection circuit; Described boost voltage circuit is in order to provide a boost voltage, and when described equipment is unloaded, main circuit voltage cannot be exported, floating voltage equals boost voltage; Described no-load voltage detection circuit detects described floating voltage, makes described equipment short circuit according to floating voltage value; Wherein, described no-load voltage detection circuit comprises a linear optical coupling, for exporting and controlling electrical isolation and described floating voltage is converted to level signal; Described no-load voltage detection circuit also comprises resistance R300 to R306, electric capacity C300, C301, C404 and variable resistor, and one end of described resistance R300 is connected with described main circuit, and the other end is connected with described electric capacity C300; Described resistance R301 one end is connected with described electric capacity C300, and the other end is connected with the diode of described linear optical coupling; Described resistance R302 one end is connected with described electric capacity C300, and the other end is connected with the diode of described linear optical coupling; Described resistance R303 one end is connected with described linear optical coupling, other end ground connection; Described resistance R304 one end is connected with described linear optical coupling, and the other end is connected with described electric capacity C301; Described variable resistor one end is connected with described electric capacity C301, and the other end is connected with described resistance R305, and convertible tip is connected with described resistance R306; Described electric capacity C404 one end is connected with described resistance R306, other end ground connection.
2. the equipment eliminating argon arc welding contacting ignition arc haftplatte as claimed in claim 1, it is characterized in that, described boost voltage circuit comprises an insulating power supply, and the two ends positive pole of described insulating power supply connects 15V voltage respectively, the two ends negative pole ground connection respectively of described insulating power supply.
3. the equipment eliminating argon arc welding contacting ignition arc haftplatte as claimed in claim 2, it is characterized in that, the both positive and negative polarity of one end of described boost voltage circuit is connected with the first decoupling capacitor, the first filter capacitor, a diode, the first resistance, the second resistance.
4. the equipment eliminating argon arc welding contacting ignition arc haftplatte as claimed in claim 2, it is characterized in that, the both positive and negative polarity of one end of described boost voltage circuit is connected with the second decoupling capacitor, the second filter capacitor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210030857.9A CN102554405B (en) | 2012-02-13 | 2012-02-13 | Device and method for eliminating argon-arc welding contact arc striking adhesion |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210030857.9A CN102554405B (en) | 2012-02-13 | 2012-02-13 | Device and method for eliminating argon-arc welding contact arc striking adhesion |
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| CN102554405A CN102554405A (en) | 2012-07-11 |
| CN102554405B true CN102554405B (en) | 2014-12-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104889531B (en) * | 2014-03-05 | 2017-08-29 | 罗建坤 | One kind welding walking mechanism |
| CN113399782B (en) * | 2021-05-31 | 2023-03-28 | 深圳市佳士科技股份有限公司 | Arc striking circuit and electric welding machine |
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| DE2740452A1 (en) * | 1977-09-08 | 1979-03-22 | Messer Griesheim Gmbh | WELDING POWER SOURCE FOR ARC WELDING WITH ALTERNATING CURRENT |
| DE4034091A1 (en) * | 1990-09-26 | 1992-04-02 | Cloos Gmbh Carl | Contact-free ignition of welding arc - using sec. direct voltage of high no-load voltage and low current density to ensure safe ignition free from weld spitting |
| CN1146388A (en) * | 1995-07-11 | 1997-04-02 | 阿尔卡泰尔电缆公司 | Ignition method for electric arc-welding |
| JPH10263813A (en) * | 1997-03-19 | 1998-10-06 | Daihen Corp | Consumable electrode type arc welding equipment |
| CN201183163Y (en) * | 2008-04-16 | 2009-01-21 | 深圳市佳士科技发展有限公司 | MOSFET inversion type arc welding machine having antisticking and arc strike lifting functions |
| CN201735932U (en) * | 2010-09-21 | 2011-02-09 | 深圳市华意隆实业发展有限公司 | Inverter type arc-welding machine with anti-sticking function and sticking arc lifting function |
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2012
- 2012-02-13 CN CN201210030857.9A patent/CN102554405B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2740452A1 (en) * | 1977-09-08 | 1979-03-22 | Messer Griesheim Gmbh | WELDING POWER SOURCE FOR ARC WELDING WITH ALTERNATING CURRENT |
| DE4034091A1 (en) * | 1990-09-26 | 1992-04-02 | Cloos Gmbh Carl | Contact-free ignition of welding arc - using sec. direct voltage of high no-load voltage and low current density to ensure safe ignition free from weld spitting |
| CN1146388A (en) * | 1995-07-11 | 1997-04-02 | 阿尔卡泰尔电缆公司 | Ignition method for electric arc-welding |
| JPH10263813A (en) * | 1997-03-19 | 1998-10-06 | Daihen Corp | Consumable electrode type arc welding equipment |
| CN201183163Y (en) * | 2008-04-16 | 2009-01-21 | 深圳市佳士科技发展有限公司 | MOSFET inversion type arc welding machine having antisticking and arc strike lifting functions |
| CN201735932U (en) * | 2010-09-21 | 2011-02-09 | 深圳市华意隆实业发展有限公司 | Inverter type arc-welding machine with anti-sticking function and sticking arc lifting function |
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